Damper.



PATENTED AUG. 7, .1906.

' M. MOGORMIGK.

DA MPER.

APPLIUATION FILED un. 7. 1905.

used.

UNITED ASTATES' PATNT OFFICE.

MICHAEL MCCORMICK. oF UNIONTOWN, PENNSYLVANIA.

DAMPER.

Specification of Letters Patent.

Patented Aug. *7, 1906.

T0 all whom t may concern.-

Beit known that I, MICHAEL McCoRMrox, a citizen of the United States ofAmerica, residing at Uniontown, in the county of Fayette and State ofPennsylvania, have invented certain new and useful Improvements inDampers, of which the following is a specification, reference being hadtherein to the accompanying drawings.

This invention relates to certain new and useful improvements indampers, and more particularly to that type of dampers used inconnection with smoke-pipes of coke-ovens.

The primary object of this invention is to provide a damper that willwithstand the eat to which it is subjected.

Another object of this invention is to provide a damper which will beextremely simple in construction, strong and durable, comarativelyinexpensive to manufacture, and `ghly ellicient for the purposes forwhich it is Briey described, my improved damper consists of a body ofiire-clay or the like infusible clay. A metallic strap is employed tobind the body and at the same time provide means whereby it may bemanipulated. The damper is particularly adapted to be used in connectionwith pipes such as used for conveying the products of combustion fromcoke-ovens to boilers, and the use oil the damp'er in this connectionwill be hereinafter more fully described.

Referring to the drawings accompanying this application, like numeralsof reference designate corresponding parts throughout the several views,in which- Figure l is a side elevation of a heat-conveying pipe havingmy improved damper therein. Fig. 2 is a similar view, upon an enlargedscale, of the damper-casing. Fig. 3 is an end view of the same. Fig. 4is a vertical transverse sectional view of the casing. Fig. 5is alongitudinal sectional view of the casing, illustrating my improveddamper mounted therein; and Fig. 6 is a top plan view of the casing. i

In the accompanying drawings I have illustrated a pipe 1, whichestablishes communication between a cokeoven 2 and a boiler 3. Duringthe process of manufacturing coke it has been the practice to convey theproducts of combustion from the cokeovens to a boiler used forgenerating steam.

. The products of combustion which are conveyed from a coke-oven to aboiler are at a very high heat, and considerable trouble has beenexperienced in using a damper or valvegate that would withstand the highdegree of temperature to which it was subjected. Metallic dampers orvalve-gates have heretofore been used; but in the course of time thesedampers or gates warp and succumb to the high degree of temperature towhich they are subjected. On account of the damper being Jfirstsubjected to a high degree of temperature and then removed into anatmosphere of a lower degree of temperature it has warped and renderedit impossible to replace the damper within its casing. To obviate this,I have constructed my improved dampers of iire-clay or the likeiniusible material. The body portion 4 of the damper in the presentinstance is entirely constructed of fire-clay; but it is obvious that Imay use a clayed body portion consisting of a substantial metallic sheetcoated or dressed with an inusible clay.

To handle the body portion of my improved dainper and to prevent theedges from being broken or cracked, I surround the same by a metallicstrap 5, the ends of which terminate centrally of the top of the bodyportion and are bent upwardly, as indicated at 6, and secured togetherby suitable bolts and nuts 7 7. The bolts serve as means for securing achain 8 to the damper,'whereby it can be easily manipulated.

When the damper is used in connection with a pipe 1, I employ a casing9, having threaded openings to receive alined sections of pipe, and thecasing is formed with an opening 10, within which the damper is adaptedto snugly fit.

In Figs. l and 5 of the drawings I have illustrated the damper aspositioned within this casing, and it will be observed that the metallicstrap lies outside of the path of products of combustion conveyed withinthe pipe l, consequently being shielded from the heat and not affectedthereby. l

I do not care to confine the use of my improved damper to pipes employedin connection with coke-ovens, as it is suitable for other purposes thanthose specified.

While I have herein shown the preferred manner of constructing myimproved damper, it is obvious thatv various changes may be IOO made inthe details of construction vWithout departing from the general spiritand scope of the invention.

What I claim, and desire to secure by Letters Patent, is

A damper comprising a metallic easing having threaded openings in itsopposite face Walls to receive alined sections of pipe,

and having a recess extending into the easing beyond the periphery ofsaid openings and open at the top of the casing, a damper of fire-clayshaped to conform to said recess in the easing and of a size to Whollycover the adjacent ends of the pipe-sections, a metallic i binding-stripon the periphery of said darnper7 said binding-strip When the damper isin the easing lying beyond the pipe-opening, the ends of saidbinding-strip being bent upwardly in parallel relation, a boltconnecting said 11p-bent ends and binding the strip on the damper7 and asecond bolt passing through the ends to receive a hoist-ehain forlifting the damper, substantially as described.

In testimony whereof I aflix rny signature in the presence of tWoWitnesses.

MICHAEL MCCO RMICK.

Witnesses JN0. BOYLE, RICHARD B. WHALEY.

